From: The World In Your Head by Steven Lehar

Fig. 4.10 The image from the retina is projected into the perceptual sphere from the center outward, as an inverse analog of the cone of light that enters the eye in the external world, taking into account eye, head, and body orientation in order to update the appropriate portion of perceptual space depending on the direction of gaze. Whatever the neurophysiological mechanism behind this incredible projective function, these are the observed properties of phenomenal perception.